Website watch.de

New Relic offers SaaS Application Performance Management and Real User Monitoring for Cloud and Data Center deployed web applications implemented in Ruby, Java, .NET or PHP.

Anti-bot CAPTCHA widget that helps digitize books by providing snippets of books for people to enter the text for. Owned by Google.

Website using the € symbol on their website - meaning it may accept payment in Euros.

Stripe is a developer-friendly way to accept payments online and in mobile apps.

Braintree is the easiest way to accept payments online and on a mobile app.

PayPal is a American international e-commerce service that enables companies and individuals to send money and to accept payments without revealing any financial details.

A rich hosted Exchange environment for every user without having to manage a server.

Mailjet is a real-time Cloud Emailing platform.

GoDaddy nameserver services

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.

Express is a fast, unopinionated, minimalist web framework for Node.js

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.

nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.

A family of standard web feed formats used to publish frequently updated information like blog entries, news headlines, audio and video.

Really Simple Discovery is a way to help client software find the services needed to read, edit, or "work with" weblogging software.

Google Tag Manager makes it easy for marketers to add and update website tags including analytics, remarketing, and more.

Open graph type entity tag

Open graph url entity tag

Open graph description entity tag

The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook

Open graph title entity tag

Open graph image entity tag

Open graph site name entity tag

Chrome for Android, since version 39 supports the "theme-color" meta tag to allow websites control the background color of the tab's UI header.

The http-equiv attribute provides an HTTP header for the information/value of the content attribute. The http-equiv attribute can be used to simulate an HTTP response header.

This page contains a meta robots tag which tells search engines and robots to index or not index the page.

When running in a browser on a mobile phone, "format-detection" meta tag determines whether or not telephone numbers in the HTML content will appear as hypertext links. The user can click a link with a telephone number to initiate a phone call to that phone number.

A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred".

Wesites using favicon rel tag

Meta descriptions are HTML attributes that provide concise explanations of the contents of web pages. Meta descriptions are commonly used on search engine result pages (SERPs) to display preview snippets for a given page.

Sites using Html 5 SVG Tag

UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.